* Removes .DS_STORE from tracked files on repository
* Moves header outside of dynamic content
When registering through github, we get the user e-mail
Adds serialization plugin, useful to send only specific attributes for the user
Adds bootstrap alert plugin for flash notice
Fixes bug where on some ocations, link counter is not being reported
* Users can edit their e-mails and e-mail notification preferences
* Fix bug where sometimes clicking a link doesnt count
* Moves header to be a clickable link
* Fixes all non-passing request specs
Sends newsletter to subscribed users
Adds sendgrid mailer configuration
Merge pull request #6 from adriancuadros/user-email

Adds sendgrid mailer configuration